/***************************************************************************
*                                                                         *
*   This file is part of the Fotowall project,                            *
*       http://code.google.com/p/fotowall                                 *
*                                                                         *
*   Copyright (C) 2007-2009 by Enrico Ros <enrico.ros@gmail.com>          *
*                                                                         *
*   This program is free software; you can redistribute it and/or modify  *
*   it under the terms of the GNU General Public License as published by  *
*   the Free Software Foundation; either version 2 of the License, or     *
*   (at your option) any later version.                                   *
*                                                                         *
 * ----------------------------------------------------------------------- *
 *																		   *
 *	Modifications for FotoKinect, Spring 2011 by Gianna Badiali,		   *
 *                                                   Gabriel Fernandez,	   *
 *                                                   Kelsey Tripp, and     *
 *                                                   Sam Swarr             *
 *																		   *
 ***************************************************************************/

#include "HighlightItem.h"
#include "RenderOpts.h"
#include <QGraphicsScene>
#include <QPainter>
#include <QTimerEvent>
#include <math.h>

HighlightItem::HighlightItem(QGraphicsItem * parent)
	: QGraphicsItem(parent)
	, m_unset(true)
	, m_xn(0)
	, m_yn(0)
	, m_phase(0)
	, m_radius(1)
	, m_closing(false)
{
	m_timer.start(30, this);
}

void HighlightItem::setPos(double x, double y)
{
	QRectF pr = parentRect();
	m_xn = (x - pr.left()) / (double)pr.width();
	m_yn = (y - pr.top()) / (double)pr.height();
	reposition();
}

void HighlightItem::setPosF(double xn, double yn)
{
	m_xn = xn;
	m_yn = yn;
	reposition();
}

void HighlightItem::reposition(const QRectF & rect)
{
	QRectF pr = rect.isNull() ? parentRect() : rect;
	QGraphicsItem::setPos((int)(pr.left() + m_xn * pr.width()), (int)(pr.top() + m_yn * pr.height()));
}

void HighlightItem::deleteAfterAnimation()
{
	m_closing = true;
}

QRectF HighlightItem::boundingRect() const
{
	return QRectF(-m_radius, -m_radius, 2 * m_radius, 2 * m_radius);
}

void HighlightItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/)
{
	if (RenderOpts::HQRendering)
		return;
	int alpha = qBound(0, (100 - (int)m_radius) * 3, 255);
	painter->setRenderHint(QPainter::Antialiasing, true);
	painter->setPen(QPen(QColor(255, 255, 255, alpha), 3));
	painter->drawEllipse(boundingRect().adjusted(1, 1, -1, -1));
}

void HighlightItem::timerEvent(QTimerEvent * event)
{
	if (event->timerId() != m_timer.timerId())
		return QObject::timerEvent(event);

	// advance phase
	m_phase++;

	// resize
	prepareGeometryChange();
	m_radius = sqrt((double)(m_phase * 200));
	update();

	// wrap around @50 {rad=100}
	if (m_phase > 50) {
		m_phase = 0;
		if (m_closing) {
			m_timer.stop();
			deleteLater();
		}
	}
}

QRectF HighlightItem::parentRect() const
{
	if (parentItem())
		return parentItem()->boundingRect();
	else if (scene())
		return scene()->sceneRect();
	return QRectF(0, 0, 10, 10);
}
